Official 7Semi CH340C USB-C to Serial TTL Converter Breakout

The 7Semi CH340C USB-C to Serial TTL Converter Breakout is a modern, compact, and highly reliable solution for seamless serial communication between USB-C–enabled devices and TTL-level serial interfaces. Designed to meet the needs of developers, engineers, students, and makers, this breakout board delivers stable performance with exceptional ease of use.

At the core of this module is the CH340C USB-to-UART chip, a widely trusted and industry-proven controller known for its excellent compatibility across Windows, macOS, and Linux operating systems. Unlike older variants, the CH340C features an integrated crystal oscillator, reducing component count and improving overall reliability. The inclusion of a USB Type-C connector ensures better durability, reversible plug orientation, and compatibility with modern laptops and power sources.

The breakout exposes a complete serial pinout, including DTR, RX, TX, VCC, CTS, and GND, making it suitable for programming and debugging a wide range of devices. It works seamlessly with Arduino boards, ESP8266, ESP32, GPS modules, microcontrollers, embedded systems, and other TTL-based peripherals. The DTR pin support enables automatic reset during firmware upload, enhancing productivity during development.

For real-time visual feedback, the board features dedicated TX and RX LEDs. The blue TX LED and red RX LED blink during data transmission and reception, allowing quick verification of serial activity without additional tools.

Compact in size and easy to integrate, the 7Semi CH340C USB-C to Serial TTL Converter Breakout is ideal for prototyping, firmware flashing, debugging, and educational use. Whether you’re building IoT devices, embedded projects, or communication interfaces, this converter delivers dependable performance and hassle-free connectivity every time.